What Happened
The exact sequence of events remains unclear, but on Wednesday morning torrents of water and debris crashed downstream on both sides of the border. Surveillance video from the Chinese side captured a wall of mud and water engulfing a building as terrified residents fled. In Nepal, surging water struck villages and towns along the Bhote Koshi and Trishuli rivers. The disaster was initially described as a flood by Nepali authorities and a mudslide by Chinese officials.

Casualties and Missing
At least 180 people have died — 177 in Nepal and three in Tibet. Chinese authorities reported "major casualties" and listed 558 missing, including 260 foreigners. On the Nepali side, officials said Thursday that 468 tourists, 393 of them foreigners, remained unaccounted for. The missing include citizens of India, Ukraine, Malaysia, the United Kingdom, South Africa and elsewhere. Australia confirmed 34 of its citizens were missing in Nepal, alongside 93 Nepali citizens. Indian spiritual leader Sadhguru noted that 77 pilgrims from around the world were at the Nepal-China border immigration office when the flood struck.

Aid Efforts
International assistance arrived quickly. The United States pledged $500,000 in emergency aid, and the International Federation of Red Cross and Red Crescent Societies released $1.4 million. David Fisher, its Nepal head, stressed that the priority is reaching affected communities and helping those who lost homes, suffered injuries, or have been cut off. The European Union activated its Copernicus satellite surveillance system to support recovery and offered more help, while the World Health Organization dispatched emergency medical supplies. Neighboring India sent 10 tonnes of humanitarian assistance.

What Caused It
The explanation has evolved but appears linked to a collapsing glacier. Within hours, Nepal's Foreign Minister Shishir Khanal suggested an earthquake triggered a landslide that blocked a river and sent water gushing downstream. China also reported a landslide hitting a border hub. The minister's statement aligned with an initial US Geological Survey report of an earthquake in Tibet north of the disaster zone. However, USGS later revised its conclusion, determining the seismic activity was "instead a glacial collapse and debris flow" that caused catastrophic downstream impacts — no earthquake had actually occurred. The disaster has devastated border communities, with humanitarian efforts now focused on rescue, aid delivery and accounting for the hundreds still missing (Bssnews)